Lens Driver Connector Layout for Slim OIS Camera Modules
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Solution Overview
Problem
The challenge is to develop a slim-structured lens driving device that can accommodate an activating length of an elastic member for Optical Image Stabilizer (OIS) function within the confines of a thinner smartphone, while preventing lens deviation due to shocks.
Innovation Solution
The lens driving device comprises a housing, a bobbin, a first coil, a magnet, a base, a substrate with a second coil, an upper elastic member, a support member, and a terminal member. The terminal member includes a first connector coupled to the substrate and a second connector coupled to the support member, with the second connector disposed under the first connector. This configuration allows for a reduced overall length of the lens driving device while maintaining effective OIS functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the camera module is made thinner to meet smartphone design requirements, then the overall size is reduced, but the activating length of the elastic member for OIS function becomes insufficient
Solution Approach 1:
The patent repositions the second connector of the terminal member to be disposed under the first connector in the vertical direction. This spatial rearrangement allows the elastic member to achieve its required activating length within the constrained z-axis thickness of the camera module, effectively utilizing the vertical dimension to resolve the conflict between compact size and OIS performance
Solution Approach 2:
The terminal member is designed with a nested structure where the second connector is positioned underneath the first connector. This nested arrangement allows the electrical connection components to be stacked vertically, freeing up horizontal space and enabling the elastic member to have sufficient activating length for effective OIS operation within the thin camera module profile
2Reliability
If the elastic member length is increased to improve OIS function, then the OIS performance is enhanced, but the overall length of the lens driving device increases
Solution Approach 1:
The patent transitions the connector arrangement from a horizontal layout to a vertical stacking configuration. By disposing the second connector under the first connector, the design achieves sufficient elastic member length for effective OIS without increasing the overall device length, as the connection components now occupy the vertical dimension rather than extending the horizontal footprint
3Length of moving object
If the connector arrangement is changed to achieve slim structure, then the device thickness is reduced, but the electrical connection reliability may be compromised
Solution Approach 1:
The terminal member employs a nested connector structure where the second connector is positioned underneath the first connector. This nested design maintains secure electrical connections while enabling a slim device profile, as the connectors are stacked vertically rather than extending horizontally, thus preserving connection reliability within reduced thickness
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The slim-structured lens driving device achieves a reduced overall length, allowing for a more compact camera module design within thinner smartphones. This configuration also reduces the tilt angle during handshake correction, minimizing image quality degradation and preventing lens disengagement due to shocks.
Implementation Method 1
an electromagnetic interaction between the magnet and the first coil
Implementation Method 2
by an electromagnetic interaction between the magnet and the first coil; a second coil arranged on the second circuit board facing the magnet
Implementation Method 3
an upper elastic member disposed on an upper portion of the bobbin and coupled to the bobbin and the housing
Data Source
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AI summary
The present embodiment of the present invention relates to a lens driving device, comprising: a housing; a bobbin disposed in the housing; a first coil disposed on the bobbin; a magnet which is disposed on the housing and faces the first coil; a base disposed under the housing; a substrate which is disposed on an upper surface of the base and comprises a circuit member including a second coil facing the magnet; an upper elastic member disposed on an upper portion of the bobbin and coupled to the bobbin and the housing; a support member coupled to the upper elastic member; and a terminal member elastically connecting the support member with the substrate, wherein the terminal member comprises; a first connector coupled to the substrate; and a second connector coupled to the support member; and wherein the second connector is disposed at a position lower than the first connector.